You already know that inadequate ventilation in the home can lead to mold, mildew, and poor indoor airflow.This, in turn, can trap pollutants indoors, leading to allergies and other, more serious health risks. So what can you do to prevent this? Fortunately, you have several options, including energy efficient ones. Here are some of them. Install a Ceiling Fan Ceiling fans help circulate the air around your home. They reduce your cooling bill by drawing cool air upwards on warm days. In the winter, ceiling fans are also efficient, reducing your heating bill. For instance, if you use a fireplace, using a ceiling fan can make it more efficient by distributing the heated air.